Can't Delete 3.99gb Phantom Garbage File!

Hi! I've been playing with a new C compiler and trying to compile a program with it, but it produced a 3.99GB garbage file. I tried to delete it several times and on three different computers. It registered as deleted, but when I refreshed the folder, the file was still there. I don't want to continue using this compiler until I can delete this file. I really want this compiler, as it seems to produce much more efficient output than what I've been using.